(57) A vacuum-type pick-up and transfer device of irregularly surfaced, shaped and sized
objects (12) such as populated printed wiring boards (PWBs) is disclosed. The apparatus
includes a plurality of downwardly directed vacuum conduits (69) that have enlarged
lips (80) at their lower end. It also includes a thin, flexible, non-porous membrane
(90) which extends transversely and loosely between the conduits and through which
the conduits extend so that their lower ends communicate with the region below the
membrane (90). the pick-up apparatus is moved down to the PWBs and vacuum applied,
so that the flexible membrane (90) seals against the PWBs, adapting and conforming
to any irregular surfaces, sizes and shapes. The apparatus includes control means
for selectively regulating the movement of the pick-up apparatus and the application
of the vacuum. The PWBs are accordingly moved to the desired location and the vacuum
released to release the PWBs.
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